src/com/android/quicksearchbox/SuggestionCursorWrapper.kt

/*
 * Copyright (C) 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.quicksearchbox

import android.database.DataSetObserver

/**
 * A suggestion cursor that delegates all methods to another SuggestionCursor.
 */
open class SuggestionCursorWrapper(userQuery: String?, private val mCursor: SuggestionCursor?) :
    AbstractSuggestionCursorWrapper(userQuery!!) {
    override fun close() {
        if (mCursor != null) {
            mCursor.close()
        }
    }

    override val count: Int
        get() = if (mCursor == null) 0 else mCursor.count
    override val position: Int
        get() = if (mCursor == null) 0 else mCursor.position

    override fun moveTo(pos: Int) {
        if (mCursor != null) {
            mCursor.moveTo(pos)
        }
    }

    override fun moveToNext(): Boolean {
        return mCursor?.moveToNext() ?: false
    }

    override fun registerDataSetObserver(observer: DataSetObserver?) {
        if (mCursor != null) {
            mCursor.registerDataSetObserver(observer)
        }
    }

    override fun unregisterDataSetObserver(observer: DataSetObserver?) {
        if (mCursor != null) {
            mCursor.unregisterDataSetObserver(observer)
        }
    }

    @Override
    override fun current(): SuggestionCursor {
        return mCursor!!
    }

    override val extraColumns: Collection<String>?
        get() = mCursor?.extraColumns

}